Conveyer-chain.



No. 743,070. PATENTED NOV. s, 1903. M. GARLAND.

GONVEYER CHAIN.

APPLICATION FILED SEPT. 17, 1903.

N0 MODEL.

AAA: 337M UNITED STATES Patented November 3, 1903.

- PATENT; OFFICE.

MICHAEL GARLAND, OF BAY CITY, MICHIGAN, ASSIGNOR TO THE M. GARLAND COMPANY, OF BAY CITY, MICHIGAN.

C-ONVE'YERI-CHAIN.

SPECIFICATION forming part of Letters Patent No. 743,070, dated November 3, 1903. Application flled Eeptemher 1'7, 1908. Serial No. 173,576. CN'o model.)

To all whom, it may concern.-

Be it known that I, MICHAEL GARLAND, a citizen of the United States, residing at Bay City, in the county of Bay and State of Michigan, have invented certain new and useful Improvements in Conveyer-Chains; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is a conveyor-chain, and relates more particularly to that type of chain which is composed of a number of links all alike arranged to be hooked together into an endless chain without the use of pintles',bolts, or nuts.

My improvements consist in the parts, their combination, and the equivalents thereof, as

will be more fully set forth in the specification and claims of this application.

Reference is had to the accompanying drawings, in which- Figure 1 is a top plan view, broken away in part, showing three links connected together. Fig. 2 is a side view of the same; and Fig. 3 is an enlarged cross-section of one of the bars, taken on the line a; as of Fig. 1.

As is clearly shown in the drawings, the device consists in a link composed of three parts--a cross-bar 1 and two side bars 2 2. The side bars are formed in one piece with the cross-bar and have sockets 3 at their ends to receive the projecting cross-bar ends 4 of the next succeeding link. Under heavy loads there is liability in chains of this type for the side bars to spring apart and become unhooked. Tie-bolts passing through the 1101'.- low bar 1 are only partly efiective to prevent this tendency to spring and are expensive and troublesome. To efiectually prevent springing apart of the side bars and to accomplish this result without the aid of bolts or pintles, I provide on the projecting ends 4 of each cross-bar a protruding curved bead or rib 4., substantially as shown in Figs. 1 and 2. Each socket 3 is formed with a corresponding curved pocket or recess 3*,the shape and curvature of which are such as to suit the rib 4. These ribs and pockets are so arranged as to not interfere with the free movement of the links in passing around a sprocket-wheel;

but by their mutual engagement they efiectually prevent spreading of the side bars and unhooking the chain under heavy loads. this connection I have also devised means for more efiectually and economically oiling the rubbing-surfaces of the chain. Each crossbar is preferably made hollow, as are also the projecting parts 4. Oil introduced into the oil-hole 1 flows out to the ends of the crossbar and thence through an opening 4.", (which may be either in the end of the part 4 or in its side,) lodging in the pocket 3 of the socket 3. It is here retained to a considerable extent, and the movement of the rib 4* in the pocket gradually works it out, so that it spreads over the bearing-surfaces of the links. Without the pocket to receive and distribute it a large per cent. of the lubricant would escape before it had a chance to become spread on the rubbing-surfaces.

In practice I prefer to make the front face 1 of the cross-bar l flat and rearwardly inclined from its bottom to its top edges, so that in conveying granular material, such as sawdust, it will scrape clean the bottom of the trough in which it runs, and the load being moved will tend to press the chain more closely to the trough-bottom instead of permitting it to' climb over the load, as is frequently the case when chains having round or vertical-faced cross-bars are used.

In' addition to the flight-surface afforded by the face of the bar 1 I also provide the links when desired with laterally-extending wings 5, preferably formed integral with the side bars 2 2 and having an upward and rearward inclination, as shown in Fig. 1. In a chain built up of these links it is not usually necessary that all the links have side wings 5 but several such links may be provided, the remaining links being without the wings.

What I claim as my invention, and desire to secure by Letters Patent, is as follows:

1. A conveyor-chain link comprising two side bars, and a cross-bar formed integral therewith and having its'ends projecting beyond the side bars; a rib on each projecting end; a socket formed in the end of each side bar, said socket being provided with a recess to receive said rib.

r 2. A conveyer-chain link comprising two ICC side bars, and a cross -bar formed integral wardiy and rearwardiyinciined front face; a

therewith and having its ends projecting berib on each projecting end; a socket formed yond the side bars; a rib on each projecting in the end of each side bar, said socket being end; a socket formed in the end of each side provided with a recess to-receive said rib. l5 5 bar, said socket being provided witha recess In testimony whereof I aflix my signature to receive said rib; an oil-inlet in the cross- I in presence of two witnesses.

bar and an oil-outlet in said projecting end.

3. A conveyer-chain link comprising two MICHAEL GARLAND side bars, and a cross-bar formed integral Witnesses: IO therewith and having its ends projecting be- WM. H. -REID, J r.,

yond the side bars; and having a flat up- ROY K. CRONKHITE. 

